Quarterly report pursuant to Section 13 or 15(d)

Description of Business, Basis of Presentation and Significant Accounting Policies - Additional Information (Detail)

v3.24.2
Description of Business, Basis of Presentation and Significant Accounting Policies - Additional Information (Detail)
 1 Months Ended 3 Months Ended 6 Months Ended
Apr. 15, 2024
USD ($)
Jun. 01, 2017
USD ($)
Feb. 01, 2012
USD ($)
Dec. 31, 2005
USD ($)
May 31, 2024
USD ($)
shares
May 31, 2023
USD ($)
May 31, 2024
USD ($)
Unit
Segment
shares
May 31, 2023
USD ($)
Business, Basis of Presentation and Significant Accounting Policies [Line Items]                
Number of reportable segments | Segment             3  
Deferred revenue         $ 53,501,280   $ 53,501,280  
Warranty payment   $ 100,000 $ 75,000 $ 50,000        
Commission paid         14,441 $ 10,958 25,493 $ 21,390
Additional capitalized contract acquisition costs, net of amortization expense         31,490 28,512 61,669 54,948
Impairment of contract assets         0   0  
Uncertain tax provisions         0   0  
Provisions for interest or penalties related to uncertain tax positions             0 0
Impairment on long lived assets         0 0 0 0
Stock-based option compensation expense         178,000 157,000 485,000 470,000
Unrealized holding (losses) gains, marketable securities         258,623 10,377 533,594 6,696
Payment warranty       $ 50,000        
Increased payment warranty   $ 100,000 $ 75,000          
Gain (loss) on interest rate swap $ 228,000       151,175 (223,974) 105,887 (223,974)
Other Nonoperating Income (Expense) [Member]                
Business, Basis of Presentation and Significant Accounting Policies [Line Items]                
Unrealized holding (losses) gains, marketable securities         $ 259,000 $ 11,000 $ 534,000 $ 7,000
Celle Corp [Member]                
Business, Basis of Presentation and Significant Accounting Policies [Line Items]                
Number of shares issued | shares         0   0  
Duke University [Member]                
Business, Basis of Presentation and Significant Accounting Policies [Line Items]                
Contracted storage amortization period         16 years   16 years  
Umbilical Cord Blood and Cord Tissue Stem Cell Service and PrepaCyte-CB [Member] | Duke University [Member]                
Business, Basis of Presentation and Significant Accounting Policies [Line Items]                
Agreement expiration date             Jan. 31, 2025  
Inventory, in units | Unit             6,000  
Number of units, per month | Unit             36  
Maximum [Member] | Umbilical Cord Blood and Cord Tissue Stem Cell Service and PrepaCyte-CB [Member] | Duke University [Member]                
Business, Basis of Presentation and Significant Accounting Policies [Line Items]                
Inventory, in units | Unit             36  
Accounts Receivables [Member]                
Business, Basis of Presentation and Significant Accounting Policies [Line Items]                
Period of doubtful for accounts receivable due from client             30 days  
Option One [Member]                
Business, Basis of Presentation and Significant Accounting Policies [Line Items]                
Contracted storage amortization period         1 year   1 year  
Option Two [Member]                
Business, Basis of Presentation and Significant Accounting Policies [Line Items]                
Contracted storage amortization period         21 years   21 years  
Option Three [Member]                
Business, Basis of Presentation and Significant Accounting Policies [Line Items]                
Contracted storage amortization period             life-time  
Contracted storage amortization description             The life-time storage plan is based on a life expectancy of 81 years, which is the current estimate by the Center for Disease Control for United States women’s life expectancy and concluded that additional data analysis would result in an immaterial difference in revenue.